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Unread 15-04-2004, 14:14
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Post Re: Using an FRC with the RCX?: Revision B TTL cable
Use this cable for connecting to the LIRT:
Code:
LIRT  TTL/Dig
DB9F  1x3 Connectors (2x)
  Tx  TTL.Rx
  Rx  TTL.Tx
 Gnd  TTL.Gnd
 RTS  Dig.Sig
 CTS Dig.Gnd
In the LIRT, the RTS and CTS pins are jumpered. Use the Digital connector to find out if the tower is connected (high when it is, low when isn't. So FALSE is CONNECTED, and TRUE is NOT CONNECTED)
The Pin Equivalents are:
Code:
3	TTL.Red
2	TTL.White
5	TTL.Black
7	Dig.White
8	Dig.Black
This is relative to the Male connector, so double check. You need to use a FEMALE connector. I believe you just switch Tx and Rx (RTS and CTS doesn't matter in this case: a jumper's a jumper)

Specific info on what to send can be found in the Mindstorms SDK. (Use v1.5 I believe)
 

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